Make filling: Stir together 1/2 stick softened butter, 1/2 cup granulated sugar and 1 tablespoon cinnamon in small bowl until well combined.

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Final preparation: On a floured surface, roll one square into a 12" x 9" rectangle about 1/4" thick (leave remaining square in refrigerator until ready to use). Using half of the filling mixture, spread a thin layer completely covering dough. Starting at long end, roll dough tightly into a spiral. Wrap with plastic wrap and freeze 30 minutes. Repeat with remaining dough and filling.

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Bake cookies: Preheat oven to 350ºF. Prepare cookie pans with parchment paper. Cut dough logs into 1/4" slices. Place on prepared cookie pan. Bake 10-12 minutes or until edges of cookies are pale golden brown. Cool cookies on pan on cooling grid 5 minutes. Remove from pan; cool completely on grid. Note: project time does not include the freezing, baking and cooling times included in this recipe.